//package com.lengyu.kangdeli.security.jwt;
//
//import io.jsonwebtoken.*;
//import io.jsonwebtoken.io.Decoders;
//import io.jsonwebtoken.security.Keys;
//import org.slf4j.Logger;
//import org.slf4j.LoggerFactory;
//import org.springframework.beans.factory.InitializingBean;
//import org.springframework.beans.factory.annotation.Value;
//import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
//import org.springframework.security.core.Authentication;
//import org.springframework.security.core.GrantedAuthority;
//import org.springframework.security.core.authority.SimpleGrantedAuthority;
//import org.springframework.security.core.userdetails.User;
//import org.springframework.stereotype.Component;
//
//import java.security.Key;
//import java.util.Arrays;
//import java.util.Collection;
//import java.util.Date;
//import java.util.stream.Collectors;
//
//@Component
//public class TokenProvider implements InitializingBean {
//
//   private final Logger log = LoggerFactory.getLogger(TokenProvider.class);
//
//   private static final String AUTHORITIES_KEY = "auth";
//
//   private final String base64Secret;
//   private final long tokenValidityInMilliseconds;
//   private final long tokenValidityInMillisecondsForRememberMe;
//
//   private Key key;
//
//
//   public TokenProvider(
//      @Value("${jwt.base64-secret}") String base64Secret,
//      @Value("${jwt.token-validity-in-seconds}") long tokenValidityInSeconds,
//      @Value("${jwt.token-validity-in-seconds-for-remember-me}") long tokenValidityInSecondsForRememberMe) {
//      this.base64Secret = base64Secret;
//      this.tokenValidityInMilliseconds = tokenValidityInSeconds * 1000;
//      this.tokenValidityInMillisecondsForRememberMe = tokenValidityInSecondsForRememberMe * 1000;
//   }
//
//   @Override
//   public void afterPropertiesSet() {
//      byte[] keyBytes = Decoders.BASE64.decode(base64Secret);
//      this.key = Keys.hmacShaKeyFor(keyBytes);
//   }
//
//   public String createToken(Authentication authentication, boolean rememberMe) {
//      String authorities = authentication.getAuthorities().stream()
//         .map(GrantedAuthority::getAuthority)
//         .collect(Collectors.joining(","));
//
//      long now = (new Date()).getTime();
//      Date validity;
//      if (rememberMe) {
//         validity = new Date(now + this.tokenValidityInMillisecondsForRememberMe);
//      } else {
//         validity = new Date(now + this.tokenValidityInMilliseconds);
//      }
//
//      return Jwts.builder()
//         .setSubject(authentication.getName())
//         .claim(AUTHORITIES_KEY, authorities)
//         .signWith(key, SignatureAlgorithm.HS512)
//         .setExpiration(validity)
//         .compact();
//   }
//
//   public Authentication getAuthentication(String token) {
//      Claims claims = Jwts.parser()
//         .setSigningKey(key)
//         .parseClaimsJws(token)
//         .getBody();
//
//      Collection<? extends GrantedAuthority> authorities =
//         Arrays.stream(claims.get(AUTHORITIES_KEY).toString().split(","))
//            .map(SimpleGrantedAuthority::new)
//            .collect(Collectors.toList());
//
//      User principal = new User(claims.getSubject(), "", authorities);
//
//      return new UsernamePasswordAuthenticationToken(principal, token, authorities);
//   }
//
//   public boolean validateToken(String authToken) {
//      try {
//         Jwts.parser().setSigningKey(key).parseClaimsJws(authToken);
//         return true;
//      } catch (io.jsonwebtoken.security.SecurityException | MalformedJwtException e) {
//         log.info("Invalid JWT signature.");
//         log.trace("Invalid JWT signature trace: {}", e);
//      } catch (ExpiredJwtException e) {
//         log.info("Expired JWT token.");
//         log.trace("Expired JWT token trace: {}", e);
//      } catch (UnsupportedJwtException e) {
//         log.info("Unsupported JWT token.");
//         log.trace("Unsupported JWT token trace: {}", e);
//      } catch (IllegalArgumentException e) {
//         log.info("JWT token compact of handler are invalid.");
//         log.trace("JWT token compact of handler are invalid trace: {}", e);
//      }
//      return false;
//   }
//}
